TECHNOLOGICAL HATCH FRAME Russian patent published in 2023 - IPC E06B3/36 

FIELD: technological hatches.

SUBSTANCE: technological hatches installed in the opening of the wall, ceiling or floor, in particular inspection or revision hatches. The frame of the technological hatch contains a frame and a supporting structure. The frame is designed as a four-sided flat contour. The supporting structure is made of a steel closed profile in the form of three sides connected in series in one plane. The supporting structure is pivotally connected to the frame by free ends of its extreme sides so that the plane of the frame in the closed position does not extend beyond the plane of the supporting structure. The end sections of the sides of the supporting structure in the area of the hinged connection contain bevels. The bevels are located opposite to the opening direction of said frame. The ends of the extreme sides of the supporting structure are designed closed.

EFFECT: increased frame strength and reduced overall frame thickness.

5 cl, 8 dwg